The photo in my post is step 6 in the “Sled” section of the Maslow assembly guide. It shows the cotter pin going through the very first link at the end of the drive chain. This is apparently the weakest link, as there is no pin in the end link. The solution is to run the pin through the next link up the chain. This shortens the chain 6.35 mm, and will affect the calibration (probably not in a good way). If your machine is calibrated, we should be able to move the chains over 1 link on the drive cogs towards the sled to compensate for the shortening of the chain, and preserve the calibration. If the machine is not calibrated, I believe the calibration routine will compensate for the slightly shorter chain, but ultimately, the firm and software will need to be updated, which, as you know, is an ongoing process.
Sorry, no photo right now… am away from the machine.